Coach Bo Pelini announced the players' departures Wednesday at his signing-day news conference. Pelini said both players plan to transfer after finishing the spring semester at Nebraska.
Heard appeared in 12 games as a sophomore backup to Ameer Abdullah. He rushed 52 times for 348 yards and three touchdowns.
Rome started three-of-11 games as a sophomore and made 19 tackles. Rome quit the team for a week in September, with Pelini saying at the time that the player's "personal goals and personal perception of where he should be on this football team doesn't match the team goals."